2 on20.c (c) 1996-8 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
5 on20.c is a low-level protocol driver for the
6 Onspec 90c20 parallel to IDE adapter.
11 1.01 GRG 1998.05.06 init_proto, release_proto
15 #define ON20_VERSION "1.01"
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/kernel.h>
21 #include <linux/types.h>
22 #include <linux/wait.h>
27 #define op(f) w2(4);w0(f);w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
28 #define vl(v) w2(4);w0(v);w2(5);w2(7);w2(5);w2(4);
30 #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
32 /* cont = 0 - access the IDE register file
33 cont = 1 - access the IDE command set
36 static int on20_read_regr( PIA *pi, int cont, int regr )
40 r = (regr<<2) + 1 + cont;
46 case 0: w2(4); w2(6); l = r1();
47 w2(4); w2(6); h = r1();
48 w2(4); w2(6); w2(4); w2(6); w2(4);
51 case 1: w2(4); w2(0x26); r = r0();
52 w2(4); w2(0x26); w2(4);
59 static void on20_write_regr( PIA *pi, int cont, int regr, int val )
63 r = (regr<<2) + 1 + cont;
70 static void on20_connect ( PIA *pi)
72 { pi->saved_r0 = r0();
75 w2(4);w0(0);w2(0xc);w2(4);w2(6);w2(4);w2(6);w2(4);
76 if (pi->mode) { op(2); vl(8); op(2); vl(9); }
77 else { op(2); vl(0); op(2); vl(8); }
80 static void on20_disconnect ( PIA *pi )
82 { w2(4);w0(7);w2(4);w2(0xc);w2(4);
87 static void on20_read_block( PIA *pi, char * buf, int count )
95 w2(4); w2(0x26); buf[k] = r0();
97 w2(6); l = r1(); w2(4);
98 w2(6); h = r1(); w2(4);
104 static void on20_write_block( PIA *pi, char * buf, int count )
110 for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); }
114 static void on20_log_adapter( PIA *pi, char * scratch, int verbose )
116 { char *mode_string[2] = {"4-bit","8-bit"};
118 printk("%s: on20 %s, OnSpec 90c20 at 0x%x, ",
119 pi->device,ON20_VERSION,pi->port);
120 printk("mode %d (%s), delay %d\n",pi->mode,
121 mode_string[pi->mode],pi->delay);
125 static struct pi_protocol on20 = {
126 .owner = THIS_MODULE,
132 .write_regr = on20_write_regr,
133 .read_regr = on20_read_regr,
134 .write_block = on20_write_block,
135 .read_block = on20_read_block,
136 .connect = on20_connect,
137 .disconnect = on20_disconnect,
138 .log_adapter = on20_log_adapter,
141 static int __init on20_init(void)
143 return paride_register(&on20);
146 static void __exit on20_exit(void)
148 paride_unregister(&on20);
151 MODULE_LICENSE("GPL");
152 module_init(on20_init)
153 module_exit(on20_exit)